膜
范德瓦尔斯力
离子键合
电导率
水溶液
化学物理
材料科学
离子电导率
质子输运
离子
纳米技术
纳米流体学
化学工程
化学
分子
物理化学
电极
有机化学
工程类
电解质
生物化学
作者
Junchao Lao,Ruijing Lv,Jun Gao,Aoxuan Wang,Jinsong Wu,Jiayan Luo
出处
期刊:ACS Nano
[American Chemical Society]
日期:2018-11-29
卷期号:12 (12): 12464-12471
被引量:145
标识
DOI:10.1021/acsnano.8b06708
摘要
High, stable, and modulatable ionic conductivity is important for many nanofluidic applications of layered two-dimensional (2D) membranes. In this study, we demonstrate a proton and ionic conductivity of the Ti3C2Tx membrane that is orders of magnitude higher than that of bulk solution at low concentrations. Importantly, the membrane is highly stable in aqueous solution without any modification, due to the strong and attractive interlayer van der Waals interaction and weak electrostatic repulsive interaction. Furthermore, by exploiting the intrinsic photothermal property of MXene, we demonstrate that the ionic conductivity can be reversely, rapidly, and completely switched on or off with laser light. This study should prove MXene membrane as a suitable platform to study and utilize nanofluidic ion transport. It should also inspire future studies to manipulate the mass transport through 2D membranes using their inherent physicochemical properties.
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